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D1 的全称 那位大虾指导!!!!!!!!!

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安防幼儿园学生

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发表于 2005-3-5 13:14:24 | 显示全部楼层

Re:D1 的全称 那位大虾指导!!!!!!!!!

D1=Digital Video Format 1(Digital 1) A 3/4" (19mm) broadcast-quality component digital videotape format that records uncompressed frames in the ITU-R BT.601 standard. Using costly tape decks and metal-particle cassettes, D1 uses 1MB of storage for each frame and 2GB of storage per minute. At 30 fps, it requires a 27MB/sec transfer rate, as there is a small amount of compression that takes place. See ITU-R BT.601 and D5.Sony´s D1 format was the first major professional digital video format, introduced in 1987.D1 stored uncompressed digitized component video, encoded at YUV 4:2:2 using the CCIR 601 raster format, along with PCM audio tracks as well as timecode. Uncompressed component video uses enormous bandwidth, and a simpler D2 system soon followed.It used a 19mm (3/4") cassette tape format, and also stores PCM audio tracks as well as timecode.D1 was notoriously expensive and the equipment required very large infrastructure changes in facilities which upgraded to this format. Early D1 operations were plagued with difficulties, though the format quickly stabilized and was renowned for its superlative image quality.D1 is still in some usage as of 2003, and many of the technologies introduced with this format are still common to more recent digital videotape formats.Panasonic´s D5 format has similar specifications, but was introduced much later.
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安防幼儿园学生

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QQ
发表于 2006-3-9 21:38:14 | 显示全部楼层

re:笑云君,真人!请经常露相啊!

明白
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安防中学生

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发表于 2006-3-11 00:55:38 | 显示全部楼层

re:笑云君,真人!请经常露相啊!

高手就是高手。
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安防幼儿园学生

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发表于 2006-11-1 06:40:43 | 显示全部楼层

re:老管好厉害呀.在下佩服.

老管好厉害呀.在下佩服.
宁波红光防盗监控 QQ:49744309
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安防大学生

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发表于 2007-2-15 06:23:22 | 显示全部楼层

re:学习中

学习中
本人现在还是安防的小小虾,请各位大哥多多帮忙呀.学习学习在学习.
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安防中学生

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发表于 2008-4-8 08:06:04 | 显示全部楼层

re:又学到新知道了

又学到新知道了
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